I am making a transistor test station. I have a step voltage for biasing but i need the step function to be current. What will the simplest way of converting this voltage to current?

 

Hello,

Here is a basic schematic of a opamp voltage-current convertor.
The current is created against the power supply.
http://www.hobby-electronics.info/course/html/ch09s04.html

Greetings,
Bertus